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                            <div style="color:gray; word-break: break-all; font-size:12px;">原英文版地址: <a href="https://www.elastic.co/guide/en/elasticsearch/reference/7.7/analysis.html" rel="nofollow" target="_blank">https://www.elastic.co/guide/en/elasticsearch/reference/7.7/analysis.html</a>, 原文档版权归 www.elastic.co 所有<br/>本地英文版地址: <a href="../en/analysis.html" rel="nofollow" target="_blank">../en/analysis.html</a></div>
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<strong>重要</strong>: 此版本不会发布额外的bug修复或文档更新。最新信息请参考 <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/index.html" rel="nofollow">当前版本文档</a>。
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<h1 class="title">
<a id="analysis"></a>Text analysis<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/elastic/elasticsearch/edit/7.7/docs/reference/analysis.asciidoc">edit</a>
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<p><em>Text analysis</em> is the process of converting unstructured text, like
the body of an email or a product description, into a structured format that’s
optimized for search.</p>
<h3>
<a id="when-to-configure-analysis"></a>When to configure text analysis<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/elastic/elasticsearch/edit/7.7/docs/reference/analysis.asciidoc">edit</a>
</h3>
<p>Elasticsearch performs text analysis when indexing or searching <a class="xref" href="text.html" title="Text datatype"><code class="literal">text</code></a> fields.</p>
<p>If your index doesn’t contain <code class="literal">text</code> fields, no further setup is needed; you can
skip the pages in this section.</p>
<p>However, if you use <code class="literal">text</code> fields or your text searches aren’t returning results
as expected, configuring text analysis can often help. You should also look into
analysis configuration if you’re using Elasticsearch to:</p>
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Build a search engine
</li>
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Mine unstructured data
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Fine-tune search for a specific language
</li>
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Perform lexicographic or linguistic research
</li>
</ul>
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<h3>
<a id="analysis-toc"></a>In this section<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/elastic/elasticsearch/edit/7.7/docs/reference/analysis.asciidoc">edit</a>
</h3>
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<a class="xref" href="analysis-overview.html" title="Text analysis overview"><em>Overview</em></a>
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<a class="xref" href="analysis-concepts.html" title="Text analysis concepts"><em>Concepts</em></a>
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<a class="xref" href="configure-text-analysis.html" title="Configure text analysis"><em>Configure text analysis</em></a>
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<a class="xref" href="analysis-analyzers.html" title="Built-in analyzer reference"><em>Built-in analyzer reference</em></a>
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<a class="xref" href="analysis-tokenizers.html" title="Tokenizer reference"><em>Tokenizer reference</em></a>
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<a class="xref" href="analysis-tokenfilters.html" title="Token filter reference"><em>Token filter reference</em></a>
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<a class="xref" href="analysis-charfilters.html" title="Character filters reference"><em>Character filters reference</em></a>
</li>
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<a class="xref" href="analysis-normalizers.html" title="Normalizers"><em>Normalizers</em></a>
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